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Finding the Fourth Proportional to 873.66, 1,312.97 and 841.34

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Solution

The fourth proportional to 873.66, 1,312.97 and 841.34 is: 1,264.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.66 : 1,312.97 = 841.34 : x
  2. Step 2: Convert to fraction form
    873.66/1,312.97 = 841.34/x
  3. Step 3: Cross multiply
    873.66x = 1,312.97 × 841.34
  4. Step 4: Simplify right side
    873.66x = 1,104,654.18
  5. Step 5: Solve for x
    x = 1,104,654.18/873.66
  6. Step 6: Final answer
    x = 1,264.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.